Trivia: Ike Eisenmann and Kim Richards, who played Tony and Tina in the original Escape to Witch Mountain, make cameos as a sheriff and waitress, respectively.
Continuity mistake: During the car chase in the beginning, we see that the driver's side mirror is gone, then back, then gone again. Later after exiting the scene, we see the taxi leaving with both side mirrors on it.
Continuity mistake: When Seth and Sara are captured outside Witch Mountain, the amount of stubble on Jack's face changes. It's all down his jaw line and on his face, and then is only on his chin and lip. (01:11:50)
Continuity mistake: In the desert, throughout the chase scene between the black SUVs and the taxi, the damage on the front bumper constantly changes. It 'fixes' itself several times, most notably on the left side. (00:15:00)
Answer: It was either Southern Night or Boogie Woogie Saturday Night.